diff --git a/cndict.cabal b/cndict.cabal
--- a/cndict.cabal
+++ b/cndict.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                cndict
-version:             0.5.2
+version:             0.5.3
 synopsis:            Chinese/Mandarin <-> English dictionary, Chinese lexer.
 -- description:
 license:             PublicDomain
diff --git a/src/Data/Chinese/Pinyin.hs b/src/Data/Chinese/Pinyin.hs
--- a/src/Data/Chinese/Pinyin.hs
+++ b/src/Data/Chinese/Pinyin.hs
@@ -72,7 +72,8 @@
       , ('o', "ōóǒòo")
       , ('e', "ēéěèe")
       , ('i', "īíǐìi")
-      , ('u', "ūúǔùu") ]
+      , ('u', "ūúǔùu")
+      , ('v', "üǖǘǚǜ") ]
 
 wordToneNumber :: Text -> Maybe Int
 wordToneNumber txt = listToMaybe